Home / 20,715.77-28,588.32-11,762.70

Finding the Fourth Proportional to 20,715.77, 28,588.32 and 11,762.70

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Solution

The fourth proportional to 20,715.77, 28,588.32 and 11,762.70 is: 16,232.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.77 : 28,588.32 = 11,762.70 : x
  2. Step 2: Convert to fraction form
    20,715.77/28,588.32 = 11,762.70/x
  3. Step 3: Cross multiply
    20,715.77x = 28,588.32 × 11,762.70
  4. Step 4: Simplify right side
    20,715.77x = 336,275,831.66
  5. Step 5: Solve for x
    x = 336,275,831.66/20,715.77
  6. Step 6: Final answer
    x = 16,232.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.